Vehicle jack



J. F. MAYER.

VEHICLE JACK.

FILED MAY 28.1920.

INVENTOR JbsEH/ F MHYEE.

A TTORNEYS Patented Feb, 13, 3.923,

nns

JOSEPH F. MAYER, OF ST. LOUIS, MISSOURI.

VEHICLE JACK.

Application filed May 28, 1920. Serial No. 384,385. I

To aZZ whom it may concern:

Be it knownthat l, Josnrii F. MAY R, a citizen of the United States,residing at St. Louis, Missouri, have invented a certain new and usefulImprovement in Vehicle Jacks, of'which thefollowing is a full, clear,and exact description, such as will enable others skilled in the art towhich it appertalns to make and use the same.

This invention relates to vehicle jacks, and has for its main object toprovide an efficient jack of simple design and inexpensive constructionin which the operating mechanism consistsof a worm arranged inengagement with a spur gear that is pro{ vided with a screw-threadedopening through which the screw of the jack passes.

By using a spur gear instead of a worm gear to co-operate with the wormon the op erating shaft, I materially reduce the cost of manufacturingthe jack and I am able to arrange the operating shaft in an inclinedposition instead of a horizontal position, thereby producing a jack thatis particularly adapted for use in connection with automobiles, due tothe fact that when the jack is arranged under one of the axles of anautomobile the operating shaft inclines upwardly in such a position thatit can be operated easily by the user. The operating worm and p the co-operating spur gear are journaled in a standard provided with avertically-disposed bore in which the screw is arranged, and the wall ofsaid bore is equipped with a vertically-disposed slot'that receives alaterally-projecting pin on the screw which prevents the screw fromturning when the spur gear rotates, said slot being closed at both endsso as to eliminate the possibility of the screw being raised high enoughto carry it out of the standard.

Figure 1 of the drawings is a perspective view of a vehicle jackconstructed in accordance with my invention.

Figure 2 is a vertical sectional view, taken through the upper portionof the standard of the ack, showing the spur gear in elevation.

Figure 3 is a horizontal sectional view, taken through the housing inwhich the spur gear and operating worm are journaled.

Figure 4 is a side elevational view of the upper portion of the jack;and

Figure 5 is a perspective view of apressed metal spur gear that can beused in place of the toothed gear shown 1n Flgure 1.

Referring to the drawings which -illus-,

trate the preferred form of my invention, A designates the standard ofthe jack which may consist either of a casting ora pressed metalstandard, said standard comprisinga vertically-disposed portion providedat its lower end with a base 1 and at its upper end with a housing 2 forreceiving a horizontallydisposed spur gear B and an operat: ing worm C,said housing being provided "at one side with anopening through whichtho spur 'gear can be introduced into the hous-- ing. The screw D of thejack is arranged vertically in a bore in the central portion of thestandard A and projects upwardly through an internall screw-threadedhole in the spur gear B. sine screw is prevented from rotatingrelatively to the standard by means of a laterally-projecting pin 3 onsaid screw that slides in a vertically-disposed slot 4 in the standardA, said slot being closed at its upper and lower ends so as to preventthe screw from being screwed upwardly out of the standard A.

The operating worm C is arranged at one,

side of the spur gear B in an inclined position, as shown in Figure l,said worm being connected to an operating shaft C directly opposite theopening in the housing 2 through which the gear 13 is inserted. Saidhousing is provided with a laterally-project-v of the operating shaft soas to arrange a cross pin 7 on said shaft in a slot '7' in said handle,as shown in Figure 1. A friction reducing bearing, such, for example, asa ball bearing 8, is preferably arranged be tween the underside of'thespur gear B and the bottom of the housing 2 in which said gear isarranged so as to insure said gear turning easily. The spur gear of thejack 7 can either consist of a cast gear or solid gear provided withstraight teeth, shown in Figure 2, or the spur gear of the jack may beformed by a pressed metal inernber B, preferably substantially cup-shaped and provided in its annular portion with openings 9, as shown inFigure 5 for receiving the spiral rib on the operating worm. Y

A jack of the above construction can be manufactured at a low cost,owing to the fact that a spur gear instead of a worm gear is used inconjunction with the operating worm'to raise and lower the screw D ofthe jack which gear is positioned in" a housing that is open at one s'deso as to enable the gear to be slipped into the housing sidewise.Another desirable feature ct such a jack is that the operating shaftcan. be arranged in an upwardly-inclined position, thereby enabling thejack to be positioned easily under the axle of an automobile andoperated without requiring the user to stoop down or assume an awkwardposition. Andother desirable features of the jack are the permanentconnection between the screw and the standard which eliminates thepossibility of the screw becomingdetached froin the standard and theintegral,

I claim as new and desire to secure by Letter-s Patent, is:

A jack, comprising a standard provided at its upper end with a housinghaving any opening at one side, a horizontally-disposed spur gear insaid housing of small enough diameter to permit it to be introducedsidewise through the opening at one side of the housing,Vertically-disposed screw in said standard that projects upwardlythrough an internally screw-threaded hole in said gear, a Vertical slotin said standard closed at its upper and lower ends, a pin on said screwthat projects outwardly through said slot, a laterally-projecting,box-like portion on said housing; arranged opposite the opening in thehousing through which said. gear is inserted, an inclined operatingshaft journaled in hearings on opposedv walls of said box-like portion,and a worm on said operating; shaft arranged in the box-like portion ofthe housing and meshing with the teeth, of said spur gear;

Josfsrn F. MAYER.

